Valve



(No Model.)

W. H. CRAWFORD.

VALVE.

No. 446,059. Patented Feb. '10, 1891.

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IVILIIIAM II. CRAWFORD, OF OSI'IIIOSII, VISCONSIN.

VALVE.

SPECIFICATION forming part of Letters Patent No. 446,059, dated February 10, 1891,

Application iiled June 20,1890. Serial No. 356,124. (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM H. CRAWFORD, of Oshkosh, in the county of IVinnebago and State of IN'visconsin, have invented certain new and useful Improvements in Valves; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it pertains to make and use the saine, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The main objects of my invention are to quickly and easily open and close a hinge or lia-p valve and to provide for taking u p wear.

It consists of certain peculiarities of construction and arrangement hereinafter particularly dcscribed,'and pointed out in the claims.

In the accompanying drawings, like letters designate the saine parts in the different figures.

Figure l is a side elevation of a valve embodying my improvements. Fig. 2 is a horizontal section of the same on the line 2 2, Fig. l. Fig. 3 is a vertical section on the line 3 3, Fig. 2; and Fig. 4 is a vertical section on the line 4 4, Fig. 3.

A represents the valve-case, of any suitable shape and construction, having the usual induction and eduction openings a a', screwthreaded for attachment topi pes, &c. Around the eduction-opening c is formed within the valve-case the annular valveseat c2.

B is a disk-shaped valve hinged inside of the valve-ease upon a pin l), so as to swing against the seat a2 and close the eductionaperture a. It is preferably formed with an annular groovefin which is inserted a ring D', of hard rubbei` or other suitable packing inaterial, which bears, when the valve is closed, against the seat c2. This ring is held in place in said groove by a disk b2, attached to the valve and projecting at its edges over said groove. In the opposit-eside of the valvecase and parallel with the pin b, uponwhich the valve hinges, is journaled a spindle C, which passes outwardly through a stufiingbox c in the valve-case, andV is provided at its protruding end with a handle D, which valve, as shown in Fig, Sn.

may be made in the form of a lever, handwheel, or of other suitable shape. \Vith1n the valve-case the spindle C is squared, and

upon the squared portion thereof is mounted a crank-arm E, which is connected by links F F with an ear h3 on the inner face of the valve B. The crank-arm E and links F F constitute a toggle-joint connection between the valve B and the spindle O.

In line with the eduction-opening o. the valve-case A is formed with a threaded aperture, in which is screwed a plug or cap G, having a threaded perforation, in which is inserted an ad justing-serew g. This adjusting-screwv bears at its tip against an adjustable bearing-piece H, which is hinged to the inside of the cap G, or otherwise suitably held inside of the valve-case against the hub of the arm E, which is rounded on one side to permit of being turned against said bearingpiece in one direction, and squared at c to abut against said bearing-piece and arrest the movement of said arm when itis brought into line with the links F F for closing the It is obvious that the relative positions of the induction and eduction connections of the valve maybe reversed, so that the valvedisk B will open with and close against pressure, which may thus be utilized instead of a spring or other equivalent device for opening the valve. To prevent the pressure against the valve-disk, when it is desired to keep the same closed, from causing the toggle-lever to knuckle, and thereby release the valve-disk,

the middle joint is preferably arranged to pass slightly beyond a straight line intersecting the points of connection of the toggle-le ver with the valve-disk B and spindle C.

Instead of hinging the bearingpiece [I to the capG, it maybe swiveled on the end of and supported by the adj Listing-screw g. The squared aperture in the hub of the arm E is made oblong', so as to permit of its movement in the direction of said arm upon the squared portion of the stem C, for the purpose of taking up wear upon the valve and its se`at,Which is eiected by advancing the screw g and the bearing-piece Il. To permit of this adjustment and to preserve the proper position of the valve B with reference to its seat ce2, the

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hole in said valve through which the pin l) passes is extended laterally, as shown in Fig.

To prevent the accidental closing of the valve B, I may provide a notch or depression in its lower edge and a hook or detent e on the hub of the arm E to engage with said notch or depression when the valve is open, as shown by dot-ted lines in Fig. 53. A partial turn of the spindle C suffices to open the valve and a like turn in the opposite direction closes it.

Vvvlien the arm E and the links F F approach the same straight line inclosing the valve, they exert an increased leveragevhich forces the valve snugly against its seat, and when they are brought into line they lock the valve closed.

I prefer to form the cap G with a depression to receive the head of the adjustingscrew g and prevent the saine from projecting beyond the outside surface of the valvecase A. The spindle C may be formed with a rib or shoulder c in the stu fling-box c to retain it in place in the valve-case. The force exerted through the toggle-joint against the valve B inclosing the same, being received by the bearing-piece II, and not by the spindle C, on which the arm lil, constituting a portion of the toggle-joint, is mounted, it is not necessary that the spindle C should have a bearing at its inner end in the valve-case, as shown in Fig. 2.

The removable cap G affords access to the interior of the valve for the purpose of repairing or adjusting the inclosed parts. The pin l), upon which the valve B is1iinged,inay be conveniently screw-threaded and squared at one end, so as to plug the outer end of the hole in the valve-case, through which it is inserted, as shown in Fig. 4.

Various changes may be made in the details of my improved valve without affecting its mode of operation or departing from the spirit of my invention.

I claiml. In a valve, the combination of the valvecase, a valve-disk hinged to said cas`e so as to swing to and from its seat, a spindle projecting through the valve-case, and a Vtoggle-lever consisting of an arm on said spindle within the valve-chamber anda link connecting it directly with the valve-disk, said arxn being adjustable in the direction of its lengt h on said spindle to take up wear and cause the valvedisk to be properly seated, substantially as and for the purposes set forth.

2. In. a valvc,thc combination of the valvecase,avalve-disk,aspindloprojecting through the valve-case, a toggle-levcr consisting of an arin capable of longitudinal movement on said spindle and of a link connecting it with the valve-disk, and a bearing-piece with which the hub of said arm engages in closing the valve, substantially as and for the purposes set forth.

In a valve, the combination of the valvecase provided with a suitable seat, a valve hinged therein at one side of said seat, so as to swing against the saine and close the adjacent opening, a spindle projectingv through the valve-case and provided on the outside with a suitable handle and on the inside with an arm capable of play in the direction of its length on said spindle and linked to said valve, and an adjustable bearing-piece held against said arm by an ad justing-screw which projects outside of the valve-case, substantially as and for the purposes set forth.

4. In a valve, the combination of the valvecaserprovided with a suitable'seat, a valve having a loose hinged connection with the inside of said case at one side of said seat, a spindle passing through thevalve-case and provided on the outside with a suitable handle and on the inside with an arm capable of y movement thereon in the direction of its length and linked to the valve, an adjustable bearing-piece held in engagement with the hub of said arm, which is rounded to permit of its being turn ed against the saine, and an adjusting-screw by which said bearing-piece is advanced to take up Wear on the valve and its seat, substantially as and for the purposesy WILLIAM ll. CRAWFORD.

\Vitnesses:

GEO. W. JoHNsoN, Guns. F. MARQUART.

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